Sierra Video 807110-00 - Manual (Page 11)

DigiLinx 1 RU Frame User’s Guide 11
Strings will have no cursor displayed, but will have a left pointing triangle in the first character
position to the right of the last character in the string. This triangle along with the right pointing
triangle (field select indicator) at the beginning of the field effectively brackets the displayed string.
As different string values are selected and their lengths vary, the left triangle’s position changes to
accommodate the new size. Because of this, string sizes are limited to 18 characters – 20 character
field minus field indicator position minus left triangle position.
Cursor Position Affects Increment or Decrement of Change
When changing the value of an integer, the amount of change is determined by the cursor position.
This position can be adjusted with the ‘star’ key. Upon entry into this field, the cursor is placed over
the one’s position and any change will increment or decrement the value by one. The ‘star’ key will
move the cursor to the left through the tens, hundreds, and so on positions, causing increments or
decrements by the associated power of ten. When the cursor is above the leftmost position of the
integer (leading blanks included), a subsequent press of the ‘star’ key will reset the cursor to the ones
position.
Handling Limits for Integer Values
When changing integer values and the amount of change would result in a value beyond the maximum
or minimum limit for that parameter, then the change is ignored. When the change would result in a
value at the limit, then it is applied.
Changing String Values
When the current parameter value is displayed as a string, then the user effectively cycles through a
circular list of strings as they make selections with the ‘Up’ and ‘Down’ keys. In the case of a ‘type 2’
value, only two strings reside in the list and it does not matter which of those two keys is used. Each
of them merely toggles between the two selections. In the case of a ‘type 3’ value, a list with at least
three or more strings exists. That list will wrap at the beginning and end when those boundaries are
crossed.
Split Field Values
Some integer values are stored in one dimension but displayed in another. For example, the
TimeCache module has a delay value that is stored in number of clocks. This value can be quite large
(100’s of millions) and cumbersome from the user’s point of view. Given that, the value is displayed
in a split field context as three sub-fields – frames, lines and clocks. Likewise, the FrameCache
module has a skew value that is stored in number of clocks but displayed as two sub-fields – lines and
clocks.
All sub-fields are displayed within the 20-character ‘field 4’ but are treated as separate fields for
navigation purposes. That is, the two field selector keys – ‘Back’ and ‘Next’, will move between the
sub-fields just as they do with the primary fields on the display. The cursor appears in the currently
selected sub-field and can be moved via the ‘star’ key with the same rules as described above. Note
however, that the underlying single value is actually being changed and re-displayed as separate fields.
Given that, a change in one sub-field may or may not cause a change in another sub-field.
Performing Module Parameter Operations
The operator members of “the list” allow the user to perform operations such as saving parameter
values to or recalling them from EEPROM. Normally, when changing parameter values, it is a